Group-velocity-matched ultrashort-pulse synthesis in a hollow fibre filled with a Raman-active gas

Group-velocity mismatch between the pump and probe pulses is shown to limit the minimum duration of ultra-short pulses synthesised through the generation of multiple Stokes and anti-Stokes sidebands in a Raman-active medium preliminary excited by a short laser pulse. The group delay of pulses involv...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2001-06, Vol.31 (6), p.471-476
Main Authors: Zheltikov, Aleksei M, Naumov, A N
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTROMAGNETIC RADIATION
FIBERS
LASERS
NONLINEAR PROBLEMS
OPTICAL FIBERS
PROBES
PULSES
RADIATIONS
RAMAN EFFECT
STOKES PARAMETERS
VELOCITY
VISIBLE RADIATION
WAVEGUIDES
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Summary:Group-velocity mismatch between the pump and probe pulses is shown to limit the minimum duration of ultra-short pulses synthesised through the generation of multiple Stokes and anti-Stokes sidebands in a Raman-active medium preliminary excited by a short laser pulse. The group delay of pulses involved in short-pulse synthesis in a Raman-active gas can be reduced by using a hollow fibre with a properly chosen inner diameter, gas pressure, and waveguide modes. The number of Stokes and anti-Stokes sidebands in the nonlinear response of a Raman-active gas can be considerably increased under these conditions, opening the way to substantially reduce the duration of light pulses synthesised using this method. (femtosecond technologies)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2001v031n06ABEH001984